Improvement in atmospheric power-hammers



w. M'ANs0N; Atmospheric-Power Hammers. N0.152,390.

Patented .lune 23,1874.

l A I nvent 01' JMU@ www 7 MMT-63 Thnx-'asses W m UivTn STATES PATENT OFFICEr TILLIAM MANSON, OF DOVNIEVILLE, CALIFORNIA.

IMPROVEMENT IN ATMOSPHERIC POWER-HAMMERS.

Specification forming part of Letters Patent No. 152,390, dated June 23, 1574; application filed April 9, 1874.

To all whom Iit may concern:

Beit known that I, WILLIAM MANsoN, of Downieville, Sierra county, State of California, have invented an Atmospheric Power-Hala mer; and I do hereby declare the following description and accompanying drawings are sutticient to enable any person skilled in the art or science to which it most nearly apper tains to make and use my said invent-ion without further invention or experiment.

My invent-ion relates to certa-in improvements in power-hannners, and their propulsion by compressed air, and in the means by which the air is compressed and supplied a1- ternately above and below the piston of the direct-acting hammer; and it consists in the combination ot` the devices hereinafter explained.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure l is a perspective view ot' my machine. Fig. 2 is an elevation in section.

A is a baseplate, having the frame B suitably formed to support the cylinders C a-nd I).

It found preferable or convenient, the whole ot' these parts may be molded and cast in one piece.

The cylinder C is made short and of comparatively large diameter, and within it the piston E works, being operated by the pistonrod F and the connecting-rod Gr from the crankwheel H. This wheel is mounted upon the drivingvshaft I, and a pulley, J, upon this shaft receives a drivingbelt from any suitable power.

The cylinder D is made as long as may be desired for the stroke ot' the hammer, and of a small diameter, as compared with the cylinder (l. The cylinder D is placed beside the cylinder C, and vertically above the anvil K, upon which the hammer L is to fall.

The piston-rod M is made ot' sufficient size and strength to serve as a stem for the hammer, and to its upper end is secured the piston N. This piston is made of considerable thickness, both to serve as a guide to the rod in its movements, and also to prevent undue wear of itself, and the interior ot' the cylinder.

Ports o o connect the upper and lower ends, respectively, of the cylinders C and D, as shown.

Now, when the shaft I and crank-wheel II arev set in motion, the piston E will receive a reciprocating motion, and will, alternately, compress the air above and below itself in the cylinder C. This compressed air escapes through the ports o o, irst below and then above the piston N in the small cylinder, so as to raise it and the attached hammer L, and then to force it down.

As the cylinder D is so much smaller than the cylinder C, it will be manifest that the air forced into it will act with greater force and velocity upon the piston N, and through it upon the hammer, thus givin git a longer and more rapid stroke than that of the piston E; consequently the momentum of the hammer will be greatly increased.

In order to regulate the length and force of the stroke of the hammer, I connect the two ends of the cylinder C by a pipe, P, which opens into it above and below the pistonstroke. A cock, It, is placed in this pipe, and by opening this cock more or less of the air can be allowed to pass above and below the piston as it works, thus lessening by so much the amount which goes to operate the hammer, the stroke of which will be correspond ingly moderated. The passage P and cock R may be placed at any point to ei'ect the above result.

By this construction I simplify the mechanism, as the air originally contained within the cylinders is alternately compressed at one end and the other, and no new additions are required, except to make good the loss from leakage through the stuiiing-boxes. This is done by means ot' a small valve, z', which opens inward when there is any lack ot' air, but which remains closed at all other times, thus preserving the ordinary atmospheric pressure within the cylinders.

The opera-tion of the hammer is min utely adjusted by the simple cock It, and the whole is very economica-l and durable.

WV hen employed for crushing quartz, it will be more convenient to connect a number ot' small cylinders, D, to the large condensingcylinder C, and they may be set in a circle around it, or in a line, or at some distance.

The connecting-passages o from the bottom. of the condensing-eylinder may be carried 'to the bottom and top, alternately, of every other operatingcylindcr I), the passages from the top being, ofcourse, also reversed, so that one-half of the stamps will go up when the other half are coming down.

The stem M may also pass out through a stuting-box at the top of the cylinder D, and be provided with any of the appliances for rotating it as it rises or falls.

It will be seenthat the lift of the hammer can be varied according to the size of the work beneath it, or, in ore crushing, by the amount of feed, and the wear of the shoesv and dies, but the operation will always be the same, whether the piston N makes a short stroke near the top of the cylinder, or near the bottom, or a stroke of the full length.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

- An atmospheric engine, consisting of the operating-cylinder D, with its piston N, in combination with the condensing-cylinder C of larger diameter, and having the condens.- illgpiston E, the two cylinders being connected by ports o o both above and below the pistons, and having the supply-port and valve e', substantially as and for the purpose above described.

In witness whereof I hereunto set my hand and seal.

WILLIAM MANSON.

Vitnesses JNO. L. BOONE, C. M. Rrci-IARDsoN. 

